similar to: Parent listing children.

Hi, I am having problems with my page. I have a banner and navigation bar in controller_name.rhtml in app/views/layout. Can someone please help? Thanks In the navigation bar, I have the following links: Category1 Sub-Category1 Sub-Category2 Sub-Category3 Sub-Category4 Sub-Category5 Sub-Category6 In the main content, I have the following links: Sub-Category1 edit delete

Hi, seem to keep running into a wall here. I can''t find any resources on site navigation that can deal with any model being in the nav, allow nesting, and can dynamically update. So I thought about it for a while, and decided on a MenuItems class, which contained the position of the child in relation to it''s siblings, where the parent and the child were polymorphic. Then a given

Hello guys, I''m a newbie in RoR and I have a problem. My DB structure is ====================================== topics table : id(int,11) name(varchar,255) categories : id (int,11) topic_id(varchar,255) name(varchar,255) ====================================== --Models:-- class Topic < ActiveRecord::Base has_many :categories end class

Moi! I'm trying to add a rather long label to a y-axis, and it's so long that it won't fit into one line. However, things get strange when I try and split it over 2 lines. The problem seems to be the plus/minus symbol, which means I have to use expression(). I'm using R1.6.1 on Windoze 2000. As an example: thing1 <- expression(paste("log odds of survival probability (

I may be doing this wrong! but I have a function which I have simplified a lot below. I want to pass some 'field names' of a data-frame to the function for it to then do some manipulation of. Here's my code: #build a simple dataset mydataset = data.frame (

Ok, David says on page 241 that sometimes a many-to-many relation with attributes are better implemented as an actual model instead of using HABTM. Well, I''ve got that situation and I can''t figure it out. All of the examples in the book have HABTM examples between 2 different tables, but I want to have a HABTM relation on 1 table with itself. (e.g., if I have a table Things,

Hey all, I''d like to abstract the process of updating different portions of the page after an Ajax request has taken place. Rather than simply putting the extra view logic in the standard rjs template, it seems to give better separation if there is a split between the core view logic (ie, inserting a row in a table), and updating any associated portions of the page. Is this possible? I

I have more or less the same problem. I''m trying to build a system where users can enter their friends. But the solutions seems not to work for me. I used same sql: CREATE TABLE `friends` ( `user_id` int(11) NOT NULL default ''0'', `friend_id` int(11) NOT NULL default ''0'', KEY `user_id` (`user_id`), KEY `friend_id` (`friend_id`),

Hi there, I have a relatively simple question, though, I couldn't find a solution for it so far. I have a table with 1000 entries and columns containing information about different parameters for each entry. What I want to do is group all parameters from one of the columns [e.g. if all 1000 entries are grouped in 30 different categories (described as character strings) in a second column] and

In my function I am trying to return multiple computed items (separated by commas). The function does what I need, but I get a warning message that multi-argument returns are deprecated. Is this a warning I should heed, or is there a more elegant and warning free way of achieving the same end? Thanks --------------------------------- [[alternative HTML version deleted]]

First things first: Hi all! I''ve been sucked into prototype and script.aculo.us develpment thanks (because of?) the Symfony PHP framework... I''d like to implement a feature on some admin pages, but I can''t seem to find the right search term to google it; I want to ask the user to confirm exit of a page, if she has changed anything on the forms displayed on it. I have

Hi All, I want to create empty vectors inside an empty data frame.The name of the vectors has to come dynamically. For example if record_mean is my empty data frame,and i have say 4 categories,the category names for record mean data frame has to recmeanC1,recmeanC2,recmeanC3,recmeanC4,which will be dynamically created and which will again be inserted in my data frame's as column values.Each

Hi I am using postgres and have two migration files like 001_create_categories.rb as class CreateCategories < ActiveRecord::Migration def self.up create_table :categories do |t| t.column :name, :string, :limit=>80 end end def self.down drop_table :categories end end and 002_populate_categories.rb class PopulateCategories < ActiveRecord::Migration

I know this isn't CentOS-specific, but it is probably a common problem - does anyone have a solution? If you mail something that is plain text from linux a recipient using outlook, it will remove line breaks more or less randomly. There is a way to tell outook to put them back as you read each message, but most people just think I sent it wrong. Is there something you can do to make a

I''m working on a simple CMS. The main data type are "listings" a listing habtm (has_and_belongs_to_many) categories and subcategories. Subcategories belong_to categories. Subcategories are basically the same as categories, but they are treated differently in a few situations. The problem is, I can''t seem to write the view/controller/model code that allows me to

I''ve got a model, "category" and another model "subcategory." Each subcategory belongs_to a category, and a category has_many subcategories. What I need to do is set it up so that I can search Category and Subcategory with one .find call. So: Category.find(:all, <etc) will find categories and subcategories. Now, I believe this can be done by making

hi, there :) Consider a blogging application whereby a user is trying to add a new blog. He/she has to select a category. Upon selecting a category from a drop down box, a new sub categories drop down box will be created (hence an AJAX call). Got this implemented and it''s ok. Now, let''s assume that a given blog can have multiple categories (and subcategories). For example, a

Hello, I am trying to make the "switchover" to programming my apps in Rails and have a question about database structure. In the past i would structure a many to many like this: categories ---------------------------------------------------- | id | name | ---------------------------------------------------- 1 Some Category 2 Another

I''m trying to wrap my caffeine soaked brain around has_many :through following along at: http://rails.techno-weenie.net/tip/2005/12/23/teaching_your_blog_model_new_tricks_with_has_many_through I think my models are a little more complex than what fits this narrative. I have a directory of members, each member can belong to multiple categories. The category table references itself

hi, I''ve a normal Category model implemented with acts_as_tree (name, parent_id) that has_many :products (name, category_id). What I''m asking for is a method to fetch every product that belongs fall into a particular category and its children, eg: if I''m asking for a root node (/category/show/1) I need to display every product that have category_id = 1 AND every product